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Author(s): Mahbub Alam1, Md. Shahriar Hasan2, Md. Abu Bin Hasan Susan3, Muhammed Shah Miran*4

Email(s): 1shahmiran@du.ac.bd

Address:

    Department of Chemistry, University of Dhaka, Dhaka-1000, Bangladesh

Published In:   Volume - 3,      Issue - 2,     Year - 2023

DOI: 10.55878/SES2023-3-2-1  

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ABSTRACT:
In this study, a protic ionic liquid (PIL), diethylmethylammonium trifluoroacetate was synthesized through neutralization of a tertiary amine, diethylmethylamine (dema) with trifluoroacetic acid (CF3COOH).Binary mixtures of [demaH] CF3COO- with a wide range of compositions with ethanol, 1-propanol, 1-butanol, and 1-pentanol were prepared and the density, viscosity, and ionic conductivity of the PIL and binary mixtures were measuredat 30°C. Excess properties were investigated byfitting density and viscosity data to the Redlich-Kister equation. An increase in the mole fraction of [demaH] CF3COO-was found to increase the density and viscosity, while a decrease was apparent with increase in the alkyl chain length of alcohols. For all compositions, binary mixtures of alcohols with shorter alkyl chains showed better conductivity when the chain length was less than five carbons. [demaH]CF3COO-and its binary mixtures were found to be poor PILs with low ionicityowing tothe low pKa(10.0) value of the constituent acid and amine of the PIL.

Cite this article:
Mahbub Alam, Md. Shahriar Hasan, Md. Abu Bin Hasan Susan, Muhammed Shah Miran* (2023), Effect of alkyl chain length of alcohols on the physicochemical properties of their binary mixtures with diethylmethylammonium trifluoroacetate, Spectrum of Emerging Sciences, 3(2), pp. 1-8. 10.55878/SES2023-3-2-1DOI: https://doi.org/10.55878/SES2023-3-2-1


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